split: Fix incorrect example result of the split builtin filter (#83982)

The following Python output proves that the second member of the resulting list should be " a", not "a":

```txt
$ python3 
Python 3.12.3 (main, Sep 11 2024, 14:17:37) [GCC 13.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> string = "jojo is, a"
>>> string.split(',')
['jojo is', ' a']
```

lib/ansible/plugins/filter/split.yml

@@ -22,7 +22,7 @@ EXAMPLES: |
     # listjojo => [ "jojo", "is", "a" ]
     listjojo: "{{ 'jojo is a' | split }}"
 
-    # listjojocomma => [ "jojo is", "a" ]
+    # listjojocomma => [ "jojo is", " a" ]
     listjojocomma: "{{ 'jojo is, a' | split(',') }}"
 
 RETURN: